Review: Nokia Lumia 900 for AT&T
The phone app is a simple affair reached via one of the home screen tiles. You can put the tile anywhere you want on the home screen or even remove it entirely. Firing up the phone takes you to the call history first. In-call options aren't surprising, and let you add a line, mute the microphone or head on over to the speakerphone. For numbers you call frequently, feel free to pin them to the home screen, which allows you to dial them without opening the phone app first.
Microsoft doesn't want you sorting through contacts, it wants you interacting with people. That's what the contact app is called the People Hub. What's neat about the People Hub is that it adds social networking to what might otherwise be a dull list of phone numbers and email addresses. Instead, it offers a look at recent status updates, recent photos, and recent calls/messages received from those in your list. That includes content from Twitter, Facebook, and LinkedIn, which can all be synced with the People Hub.
Individual contacts may be pinned to the start screen if you wish, and the contact cards hold reams of data and make it easy to send messages, start calls, or fire off emails. It's one of my favorite contact apps on any modern smartphone platform.